Host ID Emulation

When applications are migrated from a physical Solaris system
into a zone on a new system, the hostid changes to be the hostid of the new machine.

In some cases, applications depend on the original hostid,
and it is not possible to update the application configuration. In these cases,
the zone can be configured to use the hostid of the original
system. This is done by setting a zonecfg property to specify
the hostid, as described in How to Configure the Zone. The value used should be the output of
the hostid command as run on the original system. To view
the hostid in an installed zone, also use the hostid command.